在高温下,牙杆的法医行为:宏观和成像评估
Gabrielle Cristiny Moreira1, Maurício Augusto Aquino de Castro2, Rodrigo Richard da Silveira3
1Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil; Applied Health Science Post-Graduate Program and Department of Dentistry, Federal University of Juiz de Fora, GV Campus, Governador Valadares, Minas Gerais, Brazil.
Forensic science international
|October 17, 2025
概括
被高温照射的牙柱显示出放射学和辐射透明度的变化,有助于识别受害者. 宏观的根变化没有受到后台类型或温度的显著影响.
科学领域:
- 法医牙科 法医牙科
- 材料科学 材料科学 材料科学
- 牙科材料 牙科材料
背景情况:
- 在牙科修复中使用的是直肠内柱.
- 了解它们在火灾等极端条件下的行为,对于法医识别至关重要.
- 高温可以改变牙科材料的物理和放射性质.
研究的目的:
- 评估暴露在高温 (600°C,800°C,1000°C) 的牙柱内部牙柱的物理行为.
- 评估这些变化的潜力,用于法医识别目的.
主要方法:
- 在600°C,800°C或1000°C的温度下焚烧了126根牛切割刀,这些切割刀有线杆 (玻璃纤维,碳纤维,金属).
- 样品在焚烧前和之后被拍摄和放射.
- 使用ImageJ软件分析了帖子的光学密度.
主要成果:
- 没有观察到显著的宏观裂或根骨折,除了一种类型的玻璃纤维柱.
- 根色变色因温度而异 (在600°C时棕色/灰色,在800°C/1000°C时白色).
- 在柱子材料和温度之间发现了显著的放射性和辐射透明度差异,金属柱子除外.
结论:
- 内后物质和焚烧温度显著影响放射学和辐射透明度的变化.
- 宏观的根变化并没有被后台类型或温度持续地影响.
- 这些取决于材料和温度的变化对于在法医调查中识别受害者非常有价值.
相关概念视频
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Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
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In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
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The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.